State-of-the-art Of Lead Free Ferroelectrics: A Critical Review

Kumari, Poonam; Rai, Radheshyam; Sharma, S.; Shandilya, Mamta; Tiwari, Ashutosh

doi:10.5185/amlett.2015.4086

Cited by 54 publications

(16 citation statements)

References 2 publications

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“…σ ac = σ dc +Aω n (5) where n is the frequency exponent evolving in the range of 0 <n < 1. A and n are thermally activated quantities, hence electrical conduction is a thermally activated process.…”

Section: Fig7mentioning

confidence: 99%

Impedance spectroscopy studies on lead free Ba 1-x Mg x (Ti 0.9 Zr 0.1 )O 3 ceramics

Moumen¹,

Neqali²,

Asbani³

et al. 2018

Superlattices and Microstructures

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Ba 1-x Mg x (Ti 0.9 Zr 0.1 )O 3 (x= 0.01 and 0.02) ceramics were prepared using the conventional solid state reaction. Rietveld refinement performed on X-ray diffraction patterns indicates that the samples are tetragonal crystal structure with P4mm space group. By increasing Mg content from 1 to 2% the unit cell volume decreased. Likewise, the grains size is greatly reduced from 10 µm to 4 µm. The temperature dependence of dielectric constants at different frequencies exhibited typical relaxor ferroelectric characteristic, with sensitive dependence in frequency and temperature for ac conductivity. The obtained activation energy values were correlated to the proposed conduction mechanisms.

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Section: Fig7mentioning

confidence: 99%

Impedance spectroscopy studies on lead free Ba 1-x Mg x (Ti 0.9 Zr 0.1 )O 3 ceramics

Moumen¹,

Neqali²,

Asbani³

et al. 2018

Superlattices and Microstructures

View full text Add to dashboard Cite

show abstract

“…PZT ceramic is revered because it has an even greater sensitivity and higher operating temperature than other piezoelectric ceramics. One disadvantage of PZT is that it contains more than 60 lead by weight [25].…”

Section: E Pzt Sensormentioning

confidence: 99%

Non-invasive technologies of fetal heart rate diagnosis

Nassit

Berbia

2015

2015 Third World Conference on Complex Systems (WCCS)

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The fetal heart rate and uterine contractions monitoring, using the non-invasive technologies, are widely used. These techniques are the most appropriate because an invasive test can not be used daily to evaluate the well-being of the fetus during pregnancy and labor. This paper presents a description and a comparative study of the most non-invasive diagnostic technologies recording the vital signals of the fetal heart and those of the maternal heart and uterine contractions.

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“…[32] A major breakthrough in the domain of piezoelectric materials came with the discovery of ferroelectric ceramics namely lead zirconia titanate or PZT, however toxicity concerns and increased environmental awareness led to a shift in interest in the scientific community towards the development of lead-free piezoelectric materials with perovskite structures. [33] Kim et al investigated the influence of lead-free ferroelectric nanoparticles such as BaTiO 3 , ZnSO 3 , Bi 0.5 (Na 0.82 K 0.18 ) 0.5 TiO 3 and K 0.5 Na 0.5 Nb 0.995 Mn 0.005 O 3 (KNN:Mn) to develop Silk-Fibroin based biodegradable composite for powering implantable devices using body motion. [34] These ferroelectric nanoparticles are environmentally friendly piezoelectric materials exhibiting perovskite structure that is mainly responsible for polarization switching characteristics.…”

Section: Electroactive Phase Addition and Functionalizationmentioning

confidence: 99%

An Insight into Tunable Innate Piezoelectricity of Silk for Green Bioelectronics

Veronica

Hsing

2021

ChemPhysChem

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Commercially available bioelectronics account for significant percentage of e-waste, especially battery waste, that demand immediate intervention due to rising environmental concerns. Consumers are becoming increasingly aware and cautious of their contribution to carbon footprint on a regular basis. It has become imperative to adopt sustainability in every aspect of production of bioelectronics taking into consideration the growing market for wearable healthcare monitoring system. Green electronics is a relatively new concept gaining tremendous attention within the scientific and industrial community with the ultimate goal of employing organic, biodegradable, and self-sustainable system to replace the conventional inorganic battery-powered electronics. Silk is a green material that has been extensively explored for its use in functional electronics due to its tunable biodegradability and flexibility. Nevertheless, an intriguing property of Silk is its innate piezoelectricity. This review highlights the importance of crystal orientation and structure of Silk Fibroin to display piezoelectric response and documents possible strategies for its enhancement. It also provides insight into the possibility of using piezoelectric Silk as a piezoelectric sensor, actuator, and energy harvester to form self-powered hybrid systems for autonomous bioelectronics [a] A. Veronica, Prof. I-m. Hsing

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State-of-the-art Of Lead Free Ferroelectrics: A Critical Review

Cited by 54 publications

References 2 publications

Impedance spectroscopy studies on lead free Ba 1-x Mg x (Ti 0.9 Zr 0.1 )O 3 ceramics

Impedance spectroscopy studies on lead free Ba 1-x Mg x (Ti 0.9 Zr 0.1 )O 3 ceramics

Non-invasive technologies of fetal heart rate diagnosis

An Insight into Tunable Innate Piezoelectricity of Silk for Green Bioelectronics

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